from tkinter import *
print('Введите начальные координаты X:')
X = int(input())
print('Введите начальные координаты Y:')
Y = int(input())
print('Введите начальные координаты N:')
N = int(input())
coords = [0,0, 10,0, 10,10, 20,10, 10,20, 0,20]
if N == 0 and X>=0 and X<=500 and Y>=0 and Y<=500:
    pass
else:
    if N > 0 and 0*N+X>=0 and 0*N+Y>=0 and 20*N+X<=500 and 20*N+Y<=500:
        pass
    else:
        if N < 0 and 20*N+X>=0 and 20*N+Y>=0 and 0*N+X<=500 and 0*N+Y<=500:
            pass
        else:
            print('Размер фигуры превышает максимальный размер поля')
            exit()

root = Tk()
root.title("Ит марафон")
root.geometry("500x500")
cannvas = Canvas(bg="white", width=500, height=500)
cannvas.pack(anchor=CENTER, expand=1)    
cannvas.create_polygon(coords[0] *N+X, coords[1] *N+Y,
                       coords[2] *N+X, coords[3] *N+Y,
                       coords[4] *N+X, coords[5] *N+Y,
                       coords[6] *N+X, coords[7] *N+Y,
                       coords[8] *N+X, coords[9] *N+Y,
                       coords[10]*N+X, coords[11]*N+Y,)

root.mainloop()
